122.255.128.0/17
🇯🇵CIDR
122.255.128.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇯🇵 Japan
City
Chiyoda
RIR
RIPE
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 122.255.128.0/17 | AS4721JCN - JCOM Co., Ltd. | Valid | RADB | 6/13/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 122.255.128.0/18 | AS4721JCN - JCOM Co., Ltd. | Valid | — | 6/13/2026 |
| 122.255.192.0/18 | AS4721JCN - JCOM Co., Ltd. | Valid | — | 6/13/2026 |
RPKI ROAs
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS4721 | RADB | MAINT-AS9824 | 11/13/2023 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 122.255.128.0/18 | AS4721 | 🇯🇵JP | allocated |
| 122.255.192.0/19 | 🇯🇵JP | allocated | |
| 122.255.224.0/19 | 🇯🇵JP | assigned | |
| 122.255.240.0/20 | 🇯🇵JP | allocated | |
| 122.255.224.0/20 | 🇯🇵JP | allocated |
Origin ASN
AS4721
JCN - JCOM Co., Ltd.
Geolocation
API
Open https://api.ipctl.io/v1/prefix/122.255.128.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/122.255.128.0/17" | jq
External Links